const path = require("path");
module.exports = {
  // 基本路径
  publicPath: process.env.NODE_ENV === "production" ? "" : "/",
  // 输出文件目录
  outputDir: process.env.NODE_ENV === "production" ? "dist" : "devdist",
  // eslint-loader 是否在保存的时候检查
  lintOnSave: true,
  /**
   * webpack配置,see https://github.com/vuejs/vue-cli/blob/dev/docs/webpack.md
   **/
  chainWebpack: (config) => {},
  configureWebpack: (config) => {
    config.resolve = {
      // 配置解析别名
      extensions: [".js", ".json", ".vue"],
      alias: {
        "@": path.resolve(__dirname, "./src"),
        // 'public': path.resolve(__dirname, './public'),
        // 'components': path.resolve(__dirname, './src/components'),
        // 'common': path.resolve(__dirname, './src/common'),
        // 'api': path.resolve(__dirname, './src/api'),
        // 'views': path.resolve(__dirname, './src/views'),
        // 'data': path.resolve(__dirname, './src/data')
      },
    };
  },
  // 生产环境是否生成 sourceMap 文件
  productionSourceMap: false,
  // css相关配置
  css: {
    // 是否使用css分离插件 ExtractTextPlugin
    extract: true,
    // 开启 CSS source maps?
    sourceMap: false,
    // css预设器配置项
    loaderOptions: {},
    requireModuleExtension: true,
  },
  // use thread-loader for babel & TS in production build
  // enabled by default if the machine has more than 1 cores
  parallel: require("os").cpus().length > 1,
  /**
   *  PWA 插件相关配置,see https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/cli-plugin-pwa
   */
  pwa: {},
  // webpack-dev-server 相关配置
  devServer: {
    open: false, // 编译完成是否打开网页
    host: "0.0.0.0", // 指定使用地址，默认localhost,0.0.0.0代表可以被外界访问
    port: 8080, // 访问端口
    https: false, // 编译失败时刷新页面
    hot: true, // 开启热加载
    hotOnly: false,
    proxy: null, // 设置代理
    overlay: {
      // 全屏模式下是否显示脚本错误
      warnings: true,
      errors: true,
    },
    before: (app) => {},
  },
  /**
   * 第三方插件配置
   */
  pluginOptions: {},
};
